LONDON, Sept 4 (Reuters) - Germany’s short-dated government bond yields dipped to their lowest levels in over four months on Monday after the sixth and most powerful North Korean nuclear test a day earlier lifted demand for safe-haven assets.

South Korea said on Monday it was talking to the United States about deploying aircraft carriers and bombers to the Korean peninsula after signs Pyongyang might launch more missiles.

The latest tensions over Korea added a new layer of uncertainty for euro zone bond investors in a week that would otherwise have been dominated by Thursday’s European Central Bank meeting and the monetary policy outlook.

“The name of the game of this week would have been the ECB but now we have to take into account North Korea,” said Jean-Francois Robin, head of strategy at Natixis in Paris.

“There is a risk-off mood in world markets with yield curves in core markets flattening.”

Japan’s 10-year government bond yield fell to a 10-month low at minus 0.010 percent, while the price of gold, another safe-haven asset, hit its highest in almost a year.

Overall, however, the impact on bond markets of the latest episode in the standoff between the United States and North Korea was limited.

Indeed, lower-rated debt, which is often in the firing line in times of risk aversion, outperformed German benchmarks as a stronger euro was expected to keep the ECB wary of reining in its bond-buying stimulus scheme too soon.

“Euro strength underlines the ECB will be cautious with its policy unwind,” said Richard McGuire, head of rates strategy at Rabobank.